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Other Comprehensive Income | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Other Comprehensive Income | Other Comprehensive Income Other comprehensive income components and related tax effects were as follows for the years ended December 31, 2023, 2022, and 2021:
| December 31, 2023 |  | December 31, 2022 |  | December 31, 2021
Unrealized holding gains (losses) on available-for-sale securities | $ | 7,785 |  |  | $ | (67,167) |  |  | $ | (19,526) |
Less reclassification adjustment for gains recognized in earnings | (52) |  |  | (651) |  |  | (783) |
Net unrealized gains (losses) | 7,733 |  |  | (67,818) |  |  | (20,309) |
Tax effect | (1,624) |  |  | 14,242 |  |  | 4,265 |
Net-of-tax amount | 6,109 |  |  | (53,576) |  |  | (16,044) |
Amortization of unrealized gains from held-to-maturity securities | 748 |  |  | 1,107 |  |  | — |
Tax effect | (157) |  |  | (232) |  |  | — |
Net-of-tax amount | 591 |  |  | 875 |  |  | — |
Actuarial gains (losses) on postemployment health care plan | (2) |  |  | 303 |  |  | 391 |
Net amortization of transition obligation and actuarial gain | (174) |  |  | (113) |  |  | (43) |
Net unrealized gains (losses) on postemployment health care plan | (176) |  |  | 190 |  |  | 348 |
Tax effect | 37 |  |  | (40) |  |  | (73) |
Net-of-tax amount | (139) |  |  | 150 |  |  | 275 |
Unrealized gains on interest rate swap | — |  |  | 411 |  |  | 105 |
Less reclassification adjustment for gains (losses) recognized in earnings | (151) |  |  | 127 |  |  | 276 |
Net unrealized gains (losses) | (151) |  |  | 538 |  |  | 381 |
Tax effect | 32 |  |  | (113) |  |  | (80) |
Net-of-tax amount | (119) |  |  | 425 |  |  | 301 |
Other comprehensive income (loss) | $ | 6,442 |  |  | $ | (52,126) |  |  | $ | (15,468) |
The following is a summary of the change in the accumulated other comprehensive income (loss) balance, net of tax, for the years ended December 31, 2023, 2022, and 2021.
| Balance December 31, 2022 |  | Comprehensive Income (Loss) |  |  |  | Balance December 31, 2023
Unrealized gains on securities available-for-sale | $ | (54,282) |  |  | $ | 6,109 |  |  |  |  | $ | (48,173) |
Amortization of unrealized gains from held-to-maturity securities | 875 |  |  | 591 |  |  |  |  | 1,466 |
Unrealized gains (losses) on postretirement benefits plan | 768 |  |  | (139) |  |  |  |  | 629 |
Unrealized gains (losses) on interest rate swap | 119 |  |  | (119) |  |  |  |  | — |
Total | $ | (52,520) |  |  | $ | 6,442 |  |  |  |  | $ | (46,078) |
| Balance December 31, 2021 |  | Comprehensive Income (Loss) |  |  |  | Balance December 31, 2022
Unrealized losses on securities available-for-sale | $ | (706) |  |  | $ | (53,576) |  |  |  |  | $ | (54,282) |
Amortization of unrealized gains from held-to-maturity securities | — |  |  | 875 |  |  |  |  | 875 |
Unrealized gains on postretirement benefits plan | 618 |  |  | 150 |  |  |  |  | 768 |
Unrealized gains (losses) on interest rate swap | (306) |  |  | 425 |  |  |  |  | 119 |
Total | $ | (394) |  |  | $ | (52,126) |  |  |  |  | $ | (52,520) |
| Balance January 1, 2021 |  | Comprehensive Income (Loss) |  |  |  | Balance December 31, 2021
Unrealized gains (losses) on securities available-for-sale | $ | 15,338 |  |  | $ | (16,044) |  |  |  |  | $ | (706) |
Unrealized gains on postretirement benefits plan | 343 |  |  | 275 |  |  |  |  | 618 |
Unrealized gains (losses) on interest rate swap | (607) |  |  | 301 |  |  |  |  | (306) |
Total | $ | 15,074 |  |  | $ | (15,468) |  |  |  |  | $ | (394) |

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//220/tableOfContent + Details
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